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15 lines
609 B
15 lines
609 B
5 years ago
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diff -up dhcp-4.2.5/common/lpf.c.vlan dhcp-4.2.5/common/lpf.c
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--- dhcp-4.2.5/common/lpf.c.vlan 2015-10-13 18:48:35.180447618 +0200
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+++ dhcp-4.2.5/common/lpf.c 2015-10-13 18:51:29.797079032 +0200
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@@ -521,6 +521,10 @@ ssize_t receive_packet (interface, buf,
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if (cmsg->cmsg_level == SOL_PACKET &&
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cmsg->cmsg_type == PACKET_AUXDATA) {
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struct tpacket_auxdata *aux = (void *)CMSG_DATA(cmsg);
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+ /* Discard packets with stripped vlan id */
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+ /* VLAN ID is only bottom 12-bits of TCI */
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+ if (aux->tp_vlan_tci & 0x0fff)
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+ return 0;
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nocsum = aux->tp_status & TP_STATUS_CSUMNOTREADY;
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}
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}
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